package com.chenyue.cm.base.filter;

import org.springframework.stereotype.Component;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * 跨域过滤器
 *
 * @author c
 * @since 2016年6月19日
 */
@Component
public class CorsFilter implements Filter {

    @Override
    public void doFilter(ServletRequest req, ServletResponse res,
                         FilterChain chain) throws IOException, ServletException {
        HttpServletResponse response = (HttpServletResponse) res;
        response.setHeader("Access-Control-Allow-Origin", "*");
//        response.setHeader("Access-Control-Allow-Origin", "http://127.0.0.1:8100");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        response.setHeader("Access-Control-Max-Age", "3600");
        response.setHeader("Access-Control-Allow-Headers", "authorization , accesstoken,Content-Type,XFILENAME,XFILECATEGORY,XFILESIZE,x_requested_with");


        HttpServletRequest request = (HttpServletRequest) req;
        if ("OPTIONS".equals(request.getMethod())) {
            response.setStatus(200);
            response.getWriter().write("OPTIONS returns OK");
            return;
        }

        chain.doFilter(req, res);
    }

    @Override
    public void init(FilterConfig filterConfig) {
    }

    @Override
    public void destroy() {
    }
}
